Agnes of Périgord

Agnes of Périgord (died 1345) married John of Gravina, Duke of Durazzo and brother of King Robert of Naples, who arranged the 1321 match to win papal and French support for his designs in northern Italy. Her brother Hélie de Talleyrand-Périgord became a cardinal and a major figure of the Avignon papacy, and she bore three sons, Charles, Louis and Robert.

Widowed in 1335, she became a court political force, and after Robert's death in 1343 married her eldest son Charles to his granddaughter Maria of Calabria, to draw the Durazzo line nearer the throne.

Her meddling in papal diplomacy in 1345 turned Queen Joanna against her, and she died that May, reportedly poisoned by Joanna's ladies, though the tale may be fiction. Charles was executed in 1348, but her grandson Charles of Durazzo seized the crown in 1382.